315521540 has 12 divisors (see below), whose sum is σ = 662595276. Its totient is φ = 126208608.

The previous prime is 315521539. The next prime is 315521551. The reversal of 315521540 is 45125513.

It can be written as a sum of positive squares in 2 ways, for example, as 223323136 + 92198404 = 14944^2 + 9602^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7888019 + ... + 7888058.

It is an arithmetic number, because the mean of its divisors is an integer number (55216273).

Almost surely, 2^315521540 is an apocalyptic number.

It is an amenable number.

315521540 is an abundant number, since it is smaller than the sum of its proper divisors (347073736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

315521540 is a wasteful number, since it uses less digits than its factorization.

315521540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15776086 (or 15776084 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 315521540 is about 17762.9259977066. The cubic root of 315521540 is about 680.7845184257.

The spelling of 315521540 in words is "three hundred fifteen million, five hundred twenty-one thousand, five hundred forty".